apples = 9 peaches, 6 pears = 15 peaches. 1 apple and 1 pear = how many peaches.
6个苹果=9个桃子，6个梨=15个桃子．1个苹果和1个梨=多少桃子．
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(3/2) + (5/2)</gadget>
<output>4</output>

<result>4</result>