Yang Xiaosan's current weight is 44.3 kg, 1.4 kg more than 13 times his weight at birth. How many kilograms did he weigh at birth? (solution in two ways)
杨小三现在的体重是44.3千克，比他出生时的体重13倍还多1.4千克．他出生时体重是多少千克？(用两种方法解)
<gadget id="calculator">44.3 - 1.4</gadget>
<output>42.9</output>

<gadget id="calculator">42.9 / 13</gadget>
<output>3.3</output>

<result>3.3</result>