kata.js

function litres(time) {
    return Math.floor(time * 0.5);
}


console.log(litres(2)); // 1, 'should return 1 litre'

console.log(litres(1.4)); // 0, 'should return 0 litres'

console.log(litres(12.3)); // 6, 'should return 6 litres'

console.log(litres(0.82)); // 0, 'should return 0 litres'

console.log(litres(11.8)); // 5, 'should return 5 litres'

console.log(litres(1787)); // 893, 'should return 893 litres'

console.log(litres(0)); // 0, 'should return 0 litres'