A stationery store is holding a store celebration event, and all products will be sold at a 20% discount. Tiantian bought a pen with an original price of 12 yuan and a schoolbag with an original price of 36 yuan. How much does he actually need to pay?
某文具店正在举行店庆活动，所有商品一律八折销售．天天买了一支原价12元的钢笔和一只原价36元的书包．他实际需要付多少元钱？
<gadget id="calculator">12 + 36</gadget>
<output>48</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">48 * (4/5)</gadget>
<output>192/5 = around 38.4</output>

<result>192/5 = around 38.4</result>