380 = 1.48*1038 approx.
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1 square yard = 3*3 = 9 square feet so 40 sq yards = 360 sq feet. Simple!
4^3√32-3^3√108+^3√256
40 sq yards = 33.445 sq metres (to 3 dp).
340 = 12,157,665,459,056,929,000
The answer is 40, 2^3=8 2^5=32, so 32+8=40