Both elder brother and younger brother have some candies. The elder brother has 10 more candies than the younger brother. The older brother gives the younger brother 2 candies, and the younger brother will eat one.
哥哥和弟弟都有一些糖，哥哥比弟弟多10粒，哥哥给弟弟2粒，弟弟就要吃掉1粒，当弟弟比哥哥多两粒糖时，哥哥已经给了弟弟多少粒．
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<result>8</result>