Help needed with this coding round problem

Please Help…
You have been given A and B in range. Find the product of all numbers in the range.
1<=A<=100,000 and A<=B<=100,000
You need to return the answer as a string in the form of, “C x 10^D”
If C has more than 10 digits, then output C as 12345…12345 x 10^D

Example 1:
7 7
49 x 10^0

Example 2:
1 17
35568…28096 x 10^3