Xiao Ming's weight was originally that of his mother's (7/12). Later, Xiao Ming's weight increased by 5 kg, while his mother's weight remained unchanged. The ratio of Xiao Ming's weight to his mother's weight became 2:3. How many kilograms does the mother weigh?
小明的体重原来是妈妈的(7/12)，后来，小明的体重增加了5千克，而妈妈的体重不变，小明与妈妈的体重之比变成了2：3．妈妈的体重是多少千克？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

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

<gadget id="calculator">(2/3) - (7/12)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">5 / (1/12)</gadget>
<output>60</output>

<result>60</result>