In a+2b=36, if a=10, then how much is b=.
a+2b=36中，如果a=10时，那么b=多少．
<gadget id="calculator">36 - 10</gadget>
<output>26</output>

<gadget id="calculator">26 / 2</gadget>
<output>13</output>

<result>13</result>