A big monkey ate half of a basket of peaches and lost 2, leaving 23. How many peaches are there in this basket?
一筐桃子，大猴子吃了一半少2个，还剩下23个．这筐桃子原有多少个．
<gadget id="calculator">23 - 2</gadget>
<output>21</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">21 / (1/2)</gadget>
<output>42</output>

<result>42</result>