Xiao Hua has 6 yuan, Xiao Ming has 10 yuan, and the two together buy 4 pens, which is 4 yuan less. How much is each pen?
小华有6元钱，小明有10元钱，两人合起来买4支钢笔，还少4元钱．每支钢笔多少钱？
<gadget id="calculator">6 + 10 + 4</gadget>
<output>20</output>

<gadget id="calculator">20 / 4</gadget>
<output>5</output>

<result>5</result>