The Rolling Stones have landed in Toronto and organizers are putting the finishing touches on what's expected to be one of the most important events in modern music history. Here's a look at some of numbers behind the concert.

450,000 -- Number of people expected to attend the Stones benefit concert.

$400,000 -- Amount of money expected to be raised from the concert for the hospitality and healthcare workers relief fund

4 million -- Number of litres of water available on site. Concert goers are allowed to bring in two bottles of water each -- once they're gone they can get free refills on site.

52 million -- Total number of dollars organizers expect 'SARS-stock' will pump in to the economy of Toronto. The province of Ontario estimates the SARS outbreak cost the tourism industry $278 million this year. Travel to Canada is down 23 per cent -- that's the lowest level since 1990.

3,500 -- Nnumber of portable toilets (affectionately referred to as porta-potties) on site -- that breaks down to about one toilet for every 129 people.

1,545 -- Number of kilometres of toilet paper to be stocked in the portable toilets on site. Even though that's enough paper to stretch from Toronto to Winnipeg, organizers are recommending people bring their own TP with them.

250,000 -- Number of hamburgers for sale -- if you stacked them one on top of the other it would be four times the height of Toronto's CN Tower

1, 250 -- Number of Toronto police officers to be guarding the site. They'll be backed up by 1,450 private security workers and will be searching people for recreational drugs and alcohol.

325 -- Size of the park in hectares -- that's equivalent to 398 football fields. Organizers are recommending everyone wear supportive comfortable shoes and leave the sandals and high heels at home.

21.50 -- Cost of a single ticket for the Stones' concert. It's far less than the average price for a Rolling Stones ticket which was $212, up from last year's $158. The Stones estimated income for 2003 is expected to be $100 million.