.electrical-power1{width:80px; height:111px ;}
.power-formula1{width:76px; height:48px ;}
.electrical-power-exaple1{width:127px; height:78px ;}
.power-formula2{width:160px; height:133px ;}
.electrical-power1{width:80px; height:111px ;}
.electrical-power-exaple2{width:180px; height:124px ;}
.electrical-power-exaple3{width:114px; height:79px ;}
.electrical-power-exaple4{width:193px; height:94px ;}
.electrical-power-exaple5{width:180px; height:125px ;}
.electrical-power-exaple5b{width:228px; height:100px ;}