Xiaoming donated 51 yuan to the earthquake-stricken area, Xiaolin donated 4 yuan less than Xiaowen, and Xiaowen's donation was Xiaoming's (1/3), how much Xiaolin donated.
小明向地震灾区捐款51元，小林捐的款比小文少4元，而小文捐的款是小明的(1/3)，小林捐了多少元．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">51 * (1/3)</gadget>
<output>17</output>

<gadget id="calculator">17 - 4</gadget>
<output>13</output>

<result>13</result>