Xiaogang bought 1 ballpoint pen and 3 pieces of erasers, Xiaoqiang bought 8 pieces of the same eraser, and they both spent the same amount of money. The price of a ballpoint pen is equal to the price of a few erasers.
小刚买了1支圆珠笔和3块橡皮，小强买了8块同样的橡皮，两人用去的钱同样多．一枝圆珠笔的价钱等于多少块橡皮的价钱．
<gadget id="calculator">8 - 3</gadget>
<output>5</output>

<result>5</result>