\[ 490539 : 49 = 10011 \]
\[ 18703 - 736 = 17967 \]
\[ 17967 : 6 = 2994.5 \]
\[ 2 * 2994.5 = 5989 \]
\[ 10011 + 5989 = 16000 \]
Ответ: 16000