A section of road has been built, 90 meters have been built, which is 15 meters less than the unrepaired (2/3), how many meters of this road are still unrepaired?
修一段公路，已修了90米，比未修的(2/3)少15米，这条公路还有多少米未修？
<gadget id="calculator">90 + 15</gadget>
<output>105</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">105 / (2/3)</gadget>
<output>315/2 = around 157.5</output>

<result>315/2 = around 157.5</result>