Yichu Lotus is holding a promotion. Buy a box of 10 fountain pens and get 2 free. Xiao Qiao bought 4 boxes of fountain pens. How many pens can you get in total?
易初莲花搞促销活动，买一盒10支装的水笔再加送2支，小巧买了4盒水笔，一共可以拿到多少支？
<gadget id="calculator">4 * 10</gadget>
<output>40</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">40 + 8</gadget>
<output>48</output>

<result>48</result>