Hi! Can someone help me answer these two questions?

Question 3:

Nestle's revenues from its chocolate bars are $42,572,313. Their brands represent a 21% share of the global chocolate bar market. To the nearest dollar, how big is the global chocolate bar market?

Question 4:

This year, Sportchek has experienced a 10% increase from its last year's revenues of $800 million. The cycling category has always been strong. Last year the revenues represented 17% of total sales. If the proportion of revenue remains the same, what is the revenue that can be attributed to the cycling category this year? What would the revenues be if the cycling share of total revenue increased by 22% instead of remaining the same?