300-200/4, if you want to change the order of operations and do the subtraction first, what should be the formula?
300-200/4，如果要改变运算顺序先算减法，那么算式应该是多少．
<gadget id="calculator">300 - 200</gadget>
<output>100</output>

<gadget id="calculator">100 / 4</gadget>
<output>25</output>

<result>25</result>