设利息税为5%,则王爷爷支付的利息税为5000*3*4.41%*5%=33.075元王爷爷实际获得的本金和利息为5000+5000*3*4.41%*(1-5%)=5628.425元
5000*3*4.41%*5%=33.08元利息税率是按5%计算的
①5000×4.41%×3×5%=33.075(元)②33.075+5000=5033.075(元)
①5000*4.41%*3*3=1984.5(元)②1984.5+5000=6984.5(元)