In my yard, there are chickens, add 7, multiply by 7, subtract 7, divide by 7, the result is equal to 7. Do the math, how many chickens are there.
俺院里，有群鸡，加上7，乘以7，减去7，除以7，其结果，等于7．你算算，有多少只鸡．
<gadget id="calculator">7 * 7</gadget>
<output>49</output>

<gadget id="calculator">49 + 7</gadget>
<output>56</output>

<gadget id="calculator">56 / 7</gadget>
<output>8</output>

<gadget id="calculator">8 - 7</gadget>
<output>1</output>

<result>1</result>