The task is to generate the correct answer for a given math problem.

Q: Problem: a number x is mistakenly divided by 10 instead of being multiplied by 10 . what is the percentage error in the result ?

A: - 99 %
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Q: Problem: a train running at the speed of 70 km / hr crosses a pole in 9 sec . what is the length of the train ?

A: 175 m
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Q: Problem: the length of a room is 9 m and width is 4.75 m . what is the cost of paying the floor by slabs at the rate of rs . 900 per sq . metre .

A:
3847
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