12*3*25+22*3*25=34*3*25=2*17*3*25=2*25*17*3=50*51=2550
36×25+75×22=36×25+25×66=25×99=25×(100-1)=2500-25=24975
36×25+75×22=36×25+25×3×22=36×25+25×66=25×(36+66)=25×102=25×(100+2)=25×100+25×2=2500+50=2550