The number of A is 72, which is 8 times of the number of B. What is the sum of the numbers of A and B?
甲数是72，是乙数的8倍，甲、乙两数的和是多少？
<gadget id="calculator">72 / 8</gadget>
<output>9</output>

<gadget id="calculator">9 + 72</gadget>
<output>81</output>

<result>81</result>