\( 21488 : 316 \approx 68 \)
\( 3600.409 - 3805.0 = -104.591 \)
\( 818 : 100 = 8.18 \)
\( 68 + (-104.591) : 8.18 - 1 \)
\( 68 - 12.785574572127139 - 1 \)
\( 54.21442542787286 \)
Ответ: ~54.21