The quotient of adding the sum of 8 to a number, multiplying by the product of 8, subtracting the difference of 8, and dividing by 8 is 80. What is this number?
一个数加上8的和，再乘以8的积，再减去8的差，再除以8的商是80．这个数是多少．
<gadget id="calculator">80 * 8</gadget>
<output>640</output>

<gadget id="calculator">640 + 8</gadget>
<output>648</output>

<gadget id="calculator">648 / 8</gadget>
<output>81</output>

<gadget id="calculator">81 - 8</gadget>
<output>73</output>

<result>73</result>