A piece of wood is cut off (4/7) meters and there are 28 meters left. How long is this piece of wood in meters? Calculation formula: how much.
一段木料截去(4/7)米还剩28米，这段木料长多少米？算式：多少．
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">(4/7) + 28</gadget>
<output>200/7 = around 28.571429</output>

<result>200/7 = around 28.571429</result>