What is your real problem, don't you have a calculator?
I mean, do you want some help on entering it into your calculator or do you want to know how to do it without a calculator.
What is 5.8x10 to the 5 power x 6.4 x 10 to the 2 power
=5.8*6.4 * 10 5 * 10 2
=37.12 * 10 7
=3.712 * 10 8
+118654 
