In the Real World Examples Page 2

Find (3 × 10⁴)(5 × 10²). Write the answer in scientific notation.

Since multiplication can be done in any order, we can rewrite this as (3 × 5)(10⁴ × 10²). It makes our lives easier that multiplication has the versatility of Tom Hanks. We can then simplify to 15 × 10⁶, which in scientific notation is 1.5 × 10⁷. Houston, we don't have a problem. Aw yeah.