Answer :
Reciprocal of x is given by 
So, the reciprocal of 1/63 = 63
Now,
Multiplying 4/7 by 63 we get,
= 4 × 9
= 36
So, the reciprocal of 1/63 = 63
Now,
Multiplying 4/7 by 63 we get,
= 4 × 9
= 36
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