The Macau-Taipa Bridge and the Friendship Bridge are two magnificent cross-sea bridges connecting the Macau Peninsula and Taipa Island. It is known that the total length of the Macao-Taipa Bridge is 2570m, which is 15m longer than the total length of the Friendship Bridge (7/12). What is the total length of the Friendship Bridge?
澳凼大桥和友谊大桥是连接澳门半岛和凼仔岛之间的两座气势宏伟的跨海大桥．已知澳凼大桥的全长是2570m，比友谊大桥全长的(7/12)还长15m．友谊大桥的全长是多少米？
<gadget id="calculator">2_570 - 15</gadget>
<output>2_555</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">2_555 / (7/12)</gadget>
<output>4_380</output>

<result>4_380</result>