There is an invisible decimal at the end of whole numbers. 41,560,000 is the same as 41,560,000.0
From said decimal count the number of digits to its left until you get to the 4. This is the new place of the decimal. The number of digits is your exponent attached to the 10.
41,560,000 = 4.156 x 10⁷
It can also be written as:
41.56 x 10⁶
415.6 x 10⁵
4156 x 10⁴
All depends on which version you or your instructor are looking for.