We have learned the four operations +, -, *, /, and now it is stipulated that "★" is a new operation. Let a and b be two numbers, stipulate: a★b=a*b+2a, for example: 2★3=2*3+2*2=10, then 10★2=how much.
我们学过+、-、*、/这四种运算，现在规定"★"是一种新的运算．设a、b是两个数，规定：a★b=a*b+2a，例如：2★3=2*3+2*2=10，那么10★2=多少．
<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">20 + 20</gadget>
<output>40</output>

<result>40</result>