Here is a problem that can be solved using the multiplication equation 9x4=36:
Problem: John has 9 bags of marbles. Each bag contains 4 marbles. How many marbles does John have in total?
Solution: To find the total number of marbles John has, we can use the multiplication equation 9x4=36. This equation tells us that if we multiply the number of bags (9) by the number of marbles in each bag (4), we get the total number of marbles (36). Therefore, John has a total of 9x4=36 marbles.