A section of road has been built, 90 meters have been built, which is 15 meters less than 70% of the unrepaired road. How many meters of this road are still unrepaired?
修一段公路，已修了90米，比未修的70%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">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">105 / (7/10)</gadget>
<output>150</output>

<result>150</result>