fix infinity rendering #154

    @media (min-width: 300px) and (max-width: 768px){
    .s {
  
    margin-left: calc(infinity + 1 + calc(infinity - 1 + calc(infinity / 1 + calc(infinity * 1))));
    margin-right: calc(infinity + 1px + calc(infinity - 1 + calc(infinity / 1 + calc(infinity * 1))));

}

@media (300px<=width<=768px) {
 .s {
  margin-left: calc(1/0);
  margin-right: calc(1/0 + 1px)
 }
}