The stationery store in front of the school has a new batch of stationery, including 50 pens and 20 more signature pens than three times the number of fountain pens. How many pens and signature pens are there in total?
学校门口的文具店新进了一批文具，其中钢笔有50枝，签字笔比钢笔的3倍还多20枝，钢笔和签字笔一共有多少枝？
<gadget id="calculator">50 * 3</gadget>
<output>150</output>

<gadget id="calculator">150 + 20 + 50</gadget>
<output>220</output>

<result>220</result>