There are two two-digit numbers whose sum is less than 150 and satisfy the condition: the sum of all other two-digit numbers is 60 times that of one of these two two-digit numbers, then what is the product of these two two-digit numbers?
有两个二位数，其和小于150，且满足条件：其余所有的二位数之和是这两个二位数之一的60倍，那么，这两个二位数之积是多少．
<gadget id="calculator">109 * 45</gadget>
<output>4_905</output>

<gadget id="calculator">61 * 80</gadget>
<output>4_880</output>

<gadget id="calculator">4_905 - 4_880</gadget>
<output>25</output>

<gadget id="calculator">25 * 80</gadget>
<output>2_000</output>

<result>2_000</result>