To build a bridge pier, the part buried in the mud is 3m, the height of the part in the water is 20% of the whole pier, and the height of the part above the water is 150% of the part in the water. What is the height of the whole pier?
修一个桥墩，埋入泥中的部分是3m，水中部分的高度是整个桥墩的20%，水上部分的高度是水中部分的150%，整个桥墩的高度是多少？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">150 / 100</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(1/5) * (3/2)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (1/5) - (3/10)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 / (1/2)</gadget>
<output>6</output>

<result>6</result>