A street has been paved for (2/5) kilometers, and exactly (3/4) of the full length has been paved. How many kilometers is the total length of this street?
铺一条街道已经铺了(2/5)千米，正好铺了全长的(3/4)，这条街道全长多少千米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(2/5) / (3/4)</gadget>
<output>8/15 = around 0.533333</output>

<result>8/15 = around 0.533333</result>