Xiaohong goes to the stationery store and buys 5 ballpoint pens and 3 pencils, and the shared pen is 2.90 yuan. It is known that each pencil is 0.30 yuan, how much is each ballpoint pen?
小红到文具店买了5支圆珠笔和3支铅笔，共用支2.90元．已知每支铅笔0.30元，每支圆珠笔多少元？
<gadget id="calculator">0.3 * 3</gadget>
<output>0.9</output>

<gadget id="calculator">2.9 - 0.9</gadget>
<output>2</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>