36*56+72*22=36*56+36*22*2=36*(56+44)=3600
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36*56+72*22
=36*56+36*2*22
=36*56+36*44
=36*(56+44)
=36*100
=3600
=36*56+36*2*22=36*(56+44)=36*100=3600
=36*56+36*2*22
=36*56+36*44
=36*(56+44)
=36*100
=3600
36*56+72*22
=36*56+36*44
=36*(56+44)
=36*100
=3600