At least two.
As a product of its prime factors in exponents: 2^3 times 5^3 = 1000
5 times 37
It is simply: 3 times 7 = 21
To write the expression (2 \times 2 \times 3 \times 3 \times 5 \times 5) using indices, you group the identical factors together. This gives you (2^2 \times 3^2 \times 5^2). Each base number is raised to the power of the number of times it appears in the product.
23 x 3 = 24
36 = 22 x 32
24 = 23 x 3
225 = 32 x 52
Write 24 as a product of its factors. 4 x 6 = 24
22 x 32 = 36
2 x 3 x 52
It is: 2^1 times 3^2 times 5^2 = 450