Er, plus 20% of the ship's course minus the Pythagoras theorem multiplied by two over the x axis minus one equals the total velocity of Red Dwarf, which means I know everything about astro-engineering.
と言うことで 船ルートの20%を足して、 ピタゴラスの定理を引いて、 ２/x軸に掛けて １を引いて＝ 船の速度