There is a 27-story building near Tiantian's home. She runs up the steps from the first floor to the top floor every morning to exercise. There are 21 steps to go up each floor, how many steps does Tiantian have to climb every day?
甜甜家附近有一座27层大楼，她每天早晨沿台阶从一楼跑上顶楼锻炼身体．每上一层楼要走21个台阶，甜甜每天要上多少个台阶？
<gadget id="calculator">27 - 1</gadget>
<output>26</output>

<gadget id="calculator">21 * 26</gadget>
<output>546</output>

<result>546</result>