The price of 3 pencils and 8 ballpoint pens is 10.9 yuan, the price of 7 pencils and 2 ballpoint pens is 10.3 yuan, what is the price of 1 pencil and 1 pen?
3支铅笔和8支圆珠笔的价钱是10.9元，7支铅笔和2只圆珠笔的价钱是10.3元，一支铅笔和一支钢笔的价钱是多少圆．
<gadget id="calculator">10.9 + 10.3</gadget>
<output>21.2</output>

<gadget id="calculator">7 + 3</gadget>
<output>10</output>

<gadget id="calculator">21.2 / 10</gadget>
<output>2.12</output>

<result>2.12</result>