The hen laying eggs clucked, and the grandma's face blossomed with joy. I want to go to the market to sell eggs, but I worry about packing them. There are two kinds of large boxes and small boxes, each of which can hold 20 and 15. The remaining 7 is used for all small boxes of eggs, and the difference is 8 for all large boxes of eggs. Grandma's house has at least how many eggs.
母鸡下蛋咯咯哒，阿婆脸上乐开花．要上集市卖鸡蛋，却为装箱发了愁．大箱小箱有两种，各能装下20和15．全用小箱蛋余7，全用大箱蛋差8．阿婆家至少有鸡蛋多少个．
<gadget id="calculator">8 + 7</gadget>
<output>15</output>

<gadget id="calculator">20 - 15</gadget>
<output>5</output>

<gadget id="calculator">15 / 5</gadget>
<output>3</output>

<gadget id="calculator">20 * 3</gadget>
<output>60</output>

<gadget id="calculator">60 - 8</gadget>
<output>52</output>

<result>52</result>