51*49+3.51*49+51*3.51

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51*49+3.51*49+51*3.5151*49+3.51*49+51*3.5151*49+3.51*49+51*3.5151*49+3.51*49+51*3.51=51*49+3.51*(49+

51*49+3.51*49+51*3.51
51*49+3.51*49+51*3.51

51*49+3.51*49+51*3.51
51*49+3.51*49+51*3.51
=51*49+3.51*(49+51)
=51*49+3.51*100
=(50+1)*49+351
=50*49-1*49+351
=2450-49+351
=2401