The school used 150 pieces of 60cm*60cm floor tiles to decorate the computer room, each piece of floor tile was 21 yuan, and the cost of labor and cement and other materials for laying the floor tiles was 1,200 yuan. How much does it cost to lay computer room floor tiles?
学校装修电脑室，用了150块60cm*60cm的地砖，每块地砖21元，铺地砖的人工费及水泥等材料费用了1200元．铺电脑室地砖一共需要多少钱？
<gadget id="calculator">150 * 21</gadget>
<output>3_150</output>

<gadget id="calculator">3_150 + 1_200</gadget>
<output>4_350</output>

<result>4_350</result>