\( 150 \cdot 2 = 300 \)
\( 4 \cdot 150 = 600 \)
\( 5 \cdot 140 = 700 \)
\( 130 \cdot 3 = 390 \)
\( 480 : 4 = 120 \)
\( 720 : 6 = 120 \)
\( 930 : 3 = 310 \)
\( 840 : 2 = 420 \)