Really do an addition problem, because the zero in the ones digit of an addend is omitted during the calculation, the result is 702 less than the correct answer, what is the addend?
真真做一道加法题，计算时由于把一个加数的个位上的零漏掉了，结果比正确答案少702，这个加数是多少？
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">702 / 9</gadget>
<output>78</output>

<gadget id="calculator">78 * 10</gadget>
<output>780</output>

<result>780</result>