A train travels from Wuhan to Beijing. After traveling the entire distance (9/13), it travels at a speed of 90 kilometers per hour for 4 hours before reaching Beijing. How many kilometers is the total length from Wuhan to Beijing?
一列火车从武汉开往北京，行了全程的(9/13)后，又以每小时90千米的速度行了4小时才到达北京，从武汉到北京全长多少千米？
<gadget id="calculator">9 / 13</gadget>
<output>9/13 = around 0.692308</output>

<gadget id="calculator">1 - (9/13)</gadget>
<output>4/13 = around 0.307692</output>

<gadget id="calculator">4 / (4/13)</gadget>
<output>13</output>

<gadget id="calculator">90 * 13</gadget>
<output>1_170</output>

<result>1_170</result>