73-28+36/9, the first step is required to calculate addition, what is the formula.
73-28+36/9，要求第一步算加法，算式是多少．
<gadget id="calculator">28 + 36</gadget>
<output>64</output>

<gadget id="calculator">64 / 9</gadget>
<output>64/9 = around 7.111111</output>

<gadget id="calculator">73 - (64/9)</gadget>
<output>593/9 = around 65.888889</output>

<result>593/9 = around 65.888889</result>