.power2{width:160px; height:45px ;}
.power1{width:92px; height:181px ;}
.power-formula{width:134px; height:99px ;}
.runner-power{width:131px; height:131px ;}
.power-problem{width:169px; height:207px ;}
.power-formula2{width:114px; height:74px ;}
.power-problem2{width:161px; height:49px ;}
.power-problem3{width:111px; height:138px ;}
.power-problem4{width:168px; height:68px ;}
.power-problem5{width:67px; height:247px ;}
.power-problem6{width:176px; height:100px ;}