An object falls from the air, falls 4.9 meters in the first second, then falls 9.8 meters more every second than the previous second, and reaches the ground after 3 seconds, what is the original height of the object from the ground?
一个物体从空中落下，第一秒钟落下4.9米，以后每秒都比前一秒钟多落下9.8米，经过3秒钟到达地面，这个物体原来离地面的高度是多少米．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">2 * 9.8</gadget>
<output>19.6</output>

<gadget id="calculator">4.9 + 19.6</gadget>
<output>24.5</output>

<gadget id="calculator">4.9 + 24.5</gadget>
<output>29.4</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">29.4 * (3/2)</gadget>
<output>44.1</output>

<result>44.1</result>