A machinery factory produces a machine tool. Originally, each machine used 1.6 tons of steel. After technological innovation, each machine saves 0.6 tons. The existing steel is 64 tons, how many more machine tools can be manufactured than before?
机械厂生产一种机床，原来每台用钢1.6吨，技术革新后，每台节约0.6吨．现有钢材64吨，可比原来多制造多少台机床？
<result>20</result>