△/□=5...4. When □ is the smallest, △=how much
△/□=5…4．当□最小时，△=多少
<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">25 + 4</gadget>
<output>29</output>

<result>29</result>