Xiao Hua has some pictures, if he adds 3 to his number of pictures, then subtracts 4, then multiplies by 5 to get 10 pictures, how many pictures does Xiao Hua have.
小华有一些画片，如果他的画片数加上3，再减去4，然后乘上5得10张，小华有多少张画片．
<gadget id="calculator">10 / 5</gadget>
<output>2</output>

<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<result>3</result>