Xiao Ming and Xiao Hua live in the same building, each floor of this building is 2.84 meters high. Xiaohua's family lives on the fourth floor. Xiaohua said to Xiaoming: "The distance between the floor of my house and the floor of your house is the same as the ground." How far is Xiaoming's house from the ground?
小明和小华住在同一栋楼房，这栋楼房每层高2.84米．小华家住在第4层，小华对小明说："我家的地板距离你家的地板和地面的距离都是一样的．"求小明家离地面有多远？
<gadget id="calculator">7 - 1</gadget>
<output>6</output>

<gadget id="calculator">2.84 * 6</gadget>
<output>17.04</output>

<result>17.04</result>