9999*7778+3333*6666=9*1111*(7*1111+1)+3*1111*6*1111=(63+18)*1111*1111+9*1111=81*1111*1111+9*1111=9*1111*(9*1111+1)=999900005.6*69.32+138.64*0.05+693.2*0.43=5.6*69.32+69.32*2*0.05+69.32*4.3=69.32*(5.6+...