A road of 450 kilometers has been repaired (4/15), how many kilometers are left to be repaired?
修一条450千米的公路，已修好(4/15)，还剩多少千米没修？
<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">1 - (4/15)</gadget>
<output>11/15 = around 0.733333</output>

<gadget id="calculator">450 * (11/15)</gadget>
<output>330</output>

<result>330</result>