webhtml_study/day05/01-案例/02-less/03-计算.less

.box {
    width: 100 + 10px;
    width: 100 - 20px;
    width: 100 * 2px;

    // 除法
    // 68  > rem
    width: (68 / 37.5rem);
    // height: 29 ./ 37.5rem;

    height: 29 / 37.5rem;

}