#import <Foundation/Foundation.h>

 @interface SampleClass:NSObject

 - (NSNumber *)multiplyA:(NSNumber *)a withB:(NSNumber *)b;

 @end

 @implementation SampleClass

 - (NSNumber *)multiplyA:(NSNumber *)a withB:(NSNumber *)b

 {

    float number1 = [a floatValue];

    float number2 = [b floatValue];

    float product = number1 * number2;

    NSNumber *result = [NSNumber numberWithFloat:product];

    return result;

 }

 @end

 int main()

 {

    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

    SampleClass *sampleClass = [[SampleClass alloc]init];

    NSNumber *a = [NSNumber numberWithFloat:10.5];

    NSNumber *b = [NSNumber numberWithFloat:10.0];

    NSNumber *result = [sampleClass multiplyA:a withB:b];

    NSString *resultString = [result stringValue];

    NSLog(@"The product is %@",resultString);

    [pool drain];

    return ;

 }