Xiaoming and Xiaohua each have 28 yuan. If Xiaoming takes 10 yuan from Xiaoming to Xiaohua, how much more is Xiaohua than Xiaoming?
小明和小华身上各有28元钱，如果从小明身上拿10元钱给小华，那么小华比小明多多少元钱？
<gadget id="calculator">28 + 10</gadget>
<output>38</output>

<gadget id="calculator">28 - 10</gadget>
<output>18</output>

<gadget id="calculator">38 - 18</gadget>
<output>20</output>

<result>20</result>