.convert_length .el-input-group__prepend{background-color:#fff}.convert_length .el-input{width:calc(50% - 1.875rem)}.convert_length .eva{text-align:center;width:1.875rem}@media(max-width:850px){.convert_length .el-input{width:100%}.convert_length .eva{font-size:1.25rem;margin:1.25rem auto;text-align:center;width:100%}}