Vaisampayana said, “Hearing those words of that high-souled one, Bhimasena with a cheerful heart answered Hanuman, saying, ‘O foremost of monkeys, I take all this as already performed by thee. Good happen to thee. O mighty-armed one! I ask of thee this,—be thou well pleased with me. O powerful one, on thy having become our protector, the Pandavas have found help. Even by thy prowess shall we conquer all foes.”

In plain words: Bhima happily says he will think of all that as already done. He only asks that Hanuman be pleased with him, and says that with Hanuman protecting them, the Pandavas will defeat all their enemies.