Сравни 420:6...4200:60 150*10...15*100 36:9...360:90 5600:800...56:8 240*30...300*24 7200:90...7200:80
420:6=4200:60 ......70=70 150*10=15*100 ....1500=1500 36:9=360:90 .....4=4 5600:800=56:8 ...............7=7 240*30=300*24 .....7200=7200 7200:90<7200:80<br>..........80 <90