¿Alguien me ayuda a resolver esto?

Find the value of 1715⋅211.though these numbers aren't quite as nice as the ones from the example or the previous part, the procedure is the same, so this is really no more difficult. give the numerator followed by the denominator, separated by a comma.

Don't know how to find x given these segment lengths

If the scale factor between two circles is 2x/5y what is the ratio of their areas?