How much hotter than usual did Nebuchadnezzar order the furnace heated?

Answer: Seven times

Filled with rage at Shadrach, Meshach and Abednego, Nebuchadnezzar ordered the furnace heated seven times hotter than usual.

“At this, Nebuchadnezzar was filled with rage, and the expression on his face changed toward Shadrach, Meshach, and Abednego. He gave orders to heat the furnace seven times hotter than usual,”— Daniel 3:19 (BSB)