Question 980926
Your problem is really one of simplifying the expression.  When we eliminate the unnecessary stuff, whatever is left over will reduce to the answer.
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Recall also, any number (or term) divided by itself is 1.  1/1 = 1, 2/2 = 1, and pi/pi = 1...
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So, in your original problem, pi/pi = 1 and since 1 times any number is just the number, we don't need to multiply by 1 (pi/pi), so we can just eliminate it (we're really cancelling out factors we don't need)...
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So, now we're left with 5^4 / 5^2.  But 5^4 is really just 5 x 5 x 5 x 5 and 5^2 is really just 5 x 5...
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So, we have (5 x 5 x 5 x 5)/(5 x 5)...
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Well, if 1/1 = 1 and pi/pi = 1, then 5/5 = 1.  So we can factor the two fives in the denominator and cancel out two of the fives in the numerator...
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And all that is left is 5 x 5 or 5^2 or 25.  The answer is 25.
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Does this help?  Email me if you have more questions...
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cheers