Will give brainliest!! I need these answers asap!!! Please show your work!!! (Please do all of the 21 questions)

Answer: this is gonna be kinda long here i wrote some on because it was to much
Step-by-step explanation:
5. 459 times 87 = 39933
6. 2,679 times 5 = 13395
987 times 23 = 22701
9. 64,897 divided by 47 = 1380
10. 687 times 9 = 6183
17. 987 divided by 97 = 10