If a=21, b is 5 more than a, then a is how much of b.
如果a=21，b比a多5，那么a是b的多少．
<gadget id="calculator">21 + 5</gadget>
<output>26</output>

<gadget id="calculator">21 / 26</gadget>
<output>21/26 = around 0.807692</output>

<result>21/26 = around 0.807692</result>