A car travels from place A to place B at a speed of 90 kilometers per hour and arrives at the midpoint of the two places in 45 minutes. How many kilometers is the road between A and B?
一辆汽车以每小时90千米的速度从甲地开往乙地45分钟正好到两地的中点．甲乙两地公路长多少千米？
<gadget id="calculator">45 / 60</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">90 * (3/4) * 2</gadget>
<output>135</output>

<result>135</result>