Doudou and Lingling live in the same building, and there are 20 steps between each floor. Doudou lives on the second floor, and Lingling lives on the fifth floor. How many steps do Doudou need to walk from her home to Lingling's house? ．
豆豆和玲玲同住一幢楼，每层楼之间有20级台阶，豆豆住二楼，玲玲住五楼，豆豆要从自己家到玲玲家去找她玩，需要走多少级台阶．
<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">20 * 3</gadget>
<output>60</output>

<result>60</result>