A number multiplied by 10 is 720 more than the original number. What is the original number?
一个数乘10，比原来多720，原来的数是多少？
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">720 / 9</gadget>
<output>80</output>

<result>80</result>