The existing stove top is connected to two 30 amp breakers; the new range requires a 40 amp breaker, Does the existing double breaker equal a 60 amp breaker and is it safe to connect the new stove using the same setup?

The existing stove is connected to two 30 amp breakers. The new stove requires a 40 amp breaker. Is the existing setup equal to a 60 amp breaker and is it safe to connect the new stove the same way as the old?