In a six-story building, each floor is 3 meters high. Xiaofang is standing on the balcony on the fourth floor. How many meters is Xiaofang from the ground?
一栋六层的楼房，每层高3米，小芳站在四楼的阳台上，小芳离地面有多少米．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>