Zhang Hong's age (4/5) is equivalent to Li Hua's age (6/7). It is known that Li Hua is 14 years old this year, how old is Zhang Hong this year?
张红年龄的(4/5)相当于李华年龄的(6/7)，已知李华今年14岁，张红今年多少岁？
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(6/7) / (4/5)</gadget>
<output>15/14 = around 1.071429</output>

<gadget id="calculator">14 * (15/14)</gadget>
<output>15</output>

<result>15</result>