A maglev train departs from Station A to Station C, with a total length of 35 kilometers. When passing station B, the whole journey (1/10) has been done, and then another 3 minutes, 7 kilometers per minute. At this time, how much of the whole journey is left from Station C?
一列磁悬浮列车从A站出发到C站，全长35千米．经过B站时已经行了全程的(1/10)，接着又行了3分钟，每分钟行驶7千米．这时离C站还有全程的几分之几？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">7 / 35</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">3 * (1/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (1/10) - (3/5)</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>